/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

/**
 *
 * @author Administrador
 */
public class LoginValidar extends HttpServlet {

    /** 
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();

        try {
            // Cogemos el contexto
            ServletContext sc = this.getServletContext();
            // Cogemos los parametros que nos pasan y nos interesan (de moemento no valida la contraseña)
            String login = request.getParameter("login");
            if (login != null && !login.equals("")) {
                HttpSession sesion = request.getSession(true);
                sesion.setAttribute("login", login);

                
                String urlAnterior = (String)sesion.getAttribute("referer") ;

                out.println("Redirigiendo a " + urlAnterior + "...");

                response.sendRedirect(urlAnterior);
                

            } else {
                
                // Luego el recurso
                RequestDispatcher rd = sc.getRequestDispatcher("/Cabecera");

                sc.setAttribute("titulo", "Error de identificación");

                rd.include(request, response);

                out.println("<p>El login o la clave que has introducido no son correctos, por favor <a href=\"javascript:history.back()\">prueba otra vez</a>");


                rd = sc.getRequestDispatcher("/Pie");
                rd.include(request, response);
            }
        } finally {
            out.close();
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** 
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
